Used for all types of crack repairs on many materials, particularly metal and plastic. Product has been around almost as long as Ed Brady and takes abuse equally well.
Dries very, very hard! Takes 15 hours to cure, but if you put a shop lamp (especailly the kind with the silver "cone" shade) over the repair area, it will set solid in about 10 minutes and cure in about 4 -5 hours. Let it cool and finish curing another 2 or 3 hours just to be sure. Withstands heat up to 600 degrees F and can be used to seal leaks for any type of automotive fluid (not recommended for brake line repair).
Negatives: None known.
Repaired 3/16" hole and crack in transmission pan. Stopped leak, holds-up to daily use.
Repaired rear view mirror which was bustedo off in a ragged break line on a Chevy. It was the only thing that would hold white metal (porous) and hold it firm. Filed, sanded & painted... couldn't tell it was ever damaged.
There have been many recommendations on this product describing how it saved tons of time and costly repairs. See "JB Weld" in the Message Search for Rich Shaw's successful engine block repair!
Available at most major retailers and auto part stores. Cost around $5